package com.example.demo.netty;

import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class IOServer {
    public static void main(String[] args) throws Exception {
        ServerSocket serverSocket = new ServerSocket(8000);
        // (1) 接收新连接线程
        new Thread(() -> {
            try {
                run(serverSocket);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }).start();
    }

    private static void run(ServerSocket serverSocket) throws IOException {
        while (true) {
            // (1) 阻塞方法获取新的连接
            Socket socket = serverSocket.accept();
            // (2) 每一个新的连接都创建一个线程，负责读取数据
            new Thread(() -> {
                try {
                    newRun(serverSocket, socket);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }).start();
        }
    }

    private static void newRun(ServerSocket serverSocket, Socket socket) throws IOException {
        byte[] data = new byte[1024];
        InputStream inputStream = socket.getInputStream();
        while (true) {
            int len;
            // (3) 按字节流方式读取数据
            while ((len = inputStream.read(data)) != -1) {
                System.out.println(new String(data, 0, len));
            }
        }
    }
}